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<FONT color="green">001</FONT>    /*<a name="line.1"></a>
<FONT color="green">002</FONT>     * Licensed to the Apache Software Foundation (ASF) under one or more<a name="line.2"></a>
<FONT color="green">003</FONT>     * contributor license agreements.  See the NOTICE file distributed with<a name="line.3"></a>
<FONT color="green">004</FONT>     * this work for additional information regarding copyright ownership.<a name="line.4"></a>
<FONT color="green">005</FONT>     * The ASF licenses this file to You under the Apache License, Version 2.0<a name="line.5"></a>
<FONT color="green">006</FONT>     * (the "License"); you may not use this file except in compliance with<a name="line.6"></a>
<FONT color="green">007</FONT>     * the License.  You may obtain a copy of the License at<a name="line.7"></a>
<FONT color="green">008</FONT>     *<a name="line.8"></a>
<FONT color="green">009</FONT>     *      http://www.apache.org/licenses/LICENSE-2.0<a name="line.9"></a>
<FONT color="green">010</FONT>     *<a name="line.10"></a>
<FONT color="green">011</FONT>     * Unless required by applicable law or agreed to in writing, software<a name="line.11"></a>
<FONT color="green">012</FONT>     * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.12"></a>
<FONT color="green">013</FONT>     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.13"></a>
<FONT color="green">014</FONT>     * See the License for the specific language governing permissions and<a name="line.14"></a>
<FONT color="green">015</FONT>     * limitations under the License.<a name="line.15"></a>
<FONT color="green">016</FONT>     */<a name="line.16"></a>
<FONT color="green">017</FONT>    package org.apache.commons.lang3;<a name="line.17"></a>
<FONT color="green">018</FONT>    <a name="line.18"></a>
<FONT color="green">019</FONT>    /**<a name="line.19"></a>
<FONT color="green">020</FONT>     * &lt;p&gt;Operations on {@link java.lang.CharSequence} that are<a name="line.20"></a>
<FONT color="green">021</FONT>     * {@code null} safe.&lt;/p&gt;<a name="line.21"></a>
<FONT color="green">022</FONT>     *<a name="line.22"></a>
<FONT color="green">023</FONT>     * @see java.lang.CharSequence<a name="line.23"></a>
<FONT color="green">024</FONT>     * @since 3.0<a name="line.24"></a>
<FONT color="green">025</FONT>     * @version $Id: CharSequenceUtils.java 1199894 2011-11-09 17:53:59Z ggregory $<a name="line.25"></a>
<FONT color="green">026</FONT>     */<a name="line.26"></a>
<FONT color="green">027</FONT>    public class CharSequenceUtils {<a name="line.27"></a>
<FONT color="green">028</FONT>    <a name="line.28"></a>
<FONT color="green">029</FONT>        /**<a name="line.29"></a>
<FONT color="green">030</FONT>         * &lt;p&gt;{@code CharSequenceUtils} instances should NOT be constructed in<a name="line.30"></a>
<FONT color="green">031</FONT>         * standard programming. &lt;/p&gt;<a name="line.31"></a>
<FONT color="green">032</FONT>         *<a name="line.32"></a>
<FONT color="green">033</FONT>         * &lt;p&gt;This constructor is public to permit tools that require a JavaBean<a name="line.33"></a>
<FONT color="green">034</FONT>         * instance to operate.&lt;/p&gt;<a name="line.34"></a>
<FONT color="green">035</FONT>         */<a name="line.35"></a>
<FONT color="green">036</FONT>        public CharSequenceUtils() {<a name="line.36"></a>
<FONT color="green">037</FONT>            super();<a name="line.37"></a>
<FONT color="green">038</FONT>        }<a name="line.38"></a>
<FONT color="green">039</FONT>    <a name="line.39"></a>
<FONT color="green">040</FONT>        //-----------------------------------------------------------------------<a name="line.40"></a>
<FONT color="green">041</FONT>        /**<a name="line.41"></a>
<FONT color="green">042</FONT>         * &lt;p&gt;Returns a new {@code CharSequence} that is a subsequence of this<a name="line.42"></a>
<FONT color="green">043</FONT>         * sequence starting with the {@code char} value at the specified index.&lt;/p&gt;<a name="line.43"></a>
<FONT color="green">044</FONT>         *<a name="line.44"></a>
<FONT color="green">045</FONT>         * &lt;p&gt;This provides the {@code CharSequence} equivalent to {@link String#substring(int)}.<a name="line.45"></a>
<FONT color="green">046</FONT>         * The length (in {@code char}) of the returned sequence is {@code length() - start},<a name="line.46"></a>
<FONT color="green">047</FONT>         * so if {@code start == end} then an empty sequence is returned.&lt;/p&gt;<a name="line.47"></a>
<FONT color="green">048</FONT>         *<a name="line.48"></a>
<FONT color="green">049</FONT>         * @param cs  the specified subsequence, null returns null<a name="line.49"></a>
<FONT color="green">050</FONT>         * @param start  the start index, inclusive, valid<a name="line.50"></a>
<FONT color="green">051</FONT>         * @return a new subsequence, may be null<a name="line.51"></a>
<FONT color="green">052</FONT>         * @throws IndexOutOfBoundsException if {@code start} is negative or if <a name="line.52"></a>
<FONT color="green">053</FONT>         *  {@code start} is greater than {@code length()}<a name="line.53"></a>
<FONT color="green">054</FONT>         */<a name="line.54"></a>
<FONT color="green">055</FONT>        public static CharSequence subSequence(CharSequence cs, int start) {<a name="line.55"></a>
<FONT color="green">056</FONT>            return cs == null ? null : cs.subSequence(start, cs.length());<a name="line.56"></a>
<FONT color="green">057</FONT>        }<a name="line.57"></a>
<FONT color="green">058</FONT>    <a name="line.58"></a>
<FONT color="green">059</FONT>        //-----------------------------------------------------------------------<a name="line.59"></a>
<FONT color="green">060</FONT>        /**<a name="line.60"></a>
<FONT color="green">061</FONT>         * &lt;p&gt;Finds the first index in the {@code CharSequence} that matches the<a name="line.61"></a>
<FONT color="green">062</FONT>         * specified character.&lt;/p&gt;<a name="line.62"></a>
<FONT color="green">063</FONT>         *<a name="line.63"></a>
<FONT color="green">064</FONT>         * @param cs  the {@code CharSequence} to be processed, not null<a name="line.64"></a>
<FONT color="green">065</FONT>         * @param searchChar  the char to be searched for<a name="line.65"></a>
<FONT color="green">066</FONT>         * @param start  the start index, negative starts at the string start<a name="line.66"></a>
<FONT color="green">067</FONT>         * @return the index where the search char was found, -1 if not found<a name="line.67"></a>
<FONT color="green">068</FONT>         */<a name="line.68"></a>
<FONT color="green">069</FONT>        static int indexOf(CharSequence cs, int searchChar, int start) {<a name="line.69"></a>
<FONT color="green">070</FONT>            if (cs instanceof String) {<a name="line.70"></a>
<FONT color="green">071</FONT>                return ((String) cs).indexOf(searchChar, start);<a name="line.71"></a>
<FONT color="green">072</FONT>            } else {<a name="line.72"></a>
<FONT color="green">073</FONT>                int sz = cs.length();<a name="line.73"></a>
<FONT color="green">074</FONT>                if (start &lt; 0) {<a name="line.74"></a>
<FONT color="green">075</FONT>                    start = 0;<a name="line.75"></a>
<FONT color="green">076</FONT>                }<a name="line.76"></a>
<FONT color="green">077</FONT>                for (int i = start; i &lt; sz; i++) {<a name="line.77"></a>
<FONT color="green">078</FONT>                    if (cs.charAt(i) == searchChar) {<a name="line.78"></a>
<FONT color="green">079</FONT>                        return i;<a name="line.79"></a>
<FONT color="green">080</FONT>                    }<a name="line.80"></a>
<FONT color="green">081</FONT>                }<a name="line.81"></a>
<FONT color="green">082</FONT>                return -1;<a name="line.82"></a>
<FONT color="green">083</FONT>            }<a name="line.83"></a>
<FONT color="green">084</FONT>        }<a name="line.84"></a>
<FONT color="green">085</FONT>    <a name="line.85"></a>
<FONT color="green">086</FONT>        /**<a name="line.86"></a>
<FONT color="green">087</FONT>         * Used by the indexOf(CharSequence methods) as a green implementation of indexOf.<a name="line.87"></a>
<FONT color="green">088</FONT>         *<a name="line.88"></a>
<FONT color="green">089</FONT>         * @param cs the {@code CharSequence} to be processed<a name="line.89"></a>
<FONT color="green">090</FONT>         * @param searchChar the {@code CharSequence} to be searched for<a name="line.90"></a>
<FONT color="green">091</FONT>         * @param start the start index<a name="line.91"></a>
<FONT color="green">092</FONT>         * @return the index where the search sequence was found<a name="line.92"></a>
<FONT color="green">093</FONT>         */<a name="line.93"></a>
<FONT color="green">094</FONT>        static int indexOf(CharSequence cs, CharSequence searchChar, int start) {<a name="line.94"></a>
<FONT color="green">095</FONT>            return cs.toString().indexOf(searchChar.toString(), start);<a name="line.95"></a>
<FONT color="green">096</FONT>    //        if (cs instanceof String &amp;&amp; searchChar instanceof String) {<a name="line.96"></a>
<FONT color="green">097</FONT>    //            // TODO: Do we assume searchChar is usually relatively small;<a name="line.97"></a>
<FONT color="green">098</FONT>    //            //       If so then calling toString() on it is better than reverting to<a name="line.98"></a>
<FONT color="green">099</FONT>    //            //       the green implementation in the else block<a name="line.99"></a>
<FONT color="green">100</FONT>    //            return ((String) cs).indexOf((String) searchChar, start);<a name="line.100"></a>
<FONT color="green">101</FONT>    //        } else {<a name="line.101"></a>
<FONT color="green">102</FONT>    //            // TODO: Implement rather than convert to String<a name="line.102"></a>
<FONT color="green">103</FONT>    //            return cs.toString().indexOf(searchChar.toString(), start);<a name="line.103"></a>
<FONT color="green">104</FONT>    //        }<a name="line.104"></a>
<FONT color="green">105</FONT>        }<a name="line.105"></a>
<FONT color="green">106</FONT>    <a name="line.106"></a>
<FONT color="green">107</FONT>        /**<a name="line.107"></a>
<FONT color="green">108</FONT>         * &lt;p&gt;Finds the last index in the {@code CharSequence} that matches the<a name="line.108"></a>
<FONT color="green">109</FONT>         * specified character.&lt;/p&gt;<a name="line.109"></a>
<FONT color="green">110</FONT>         *<a name="line.110"></a>
<FONT color="green">111</FONT>         * @param cs  the {@code CharSequence} to be processed<a name="line.111"></a>
<FONT color="green">112</FONT>         * @param searchChar  the char to be searched for<a name="line.112"></a>
<FONT color="green">113</FONT>         * @param start  the start index, negative returns -1, beyond length starts at end<a name="line.113"></a>
<FONT color="green">114</FONT>         * @return the index where the search char was found, -1 if not found<a name="line.114"></a>
<FONT color="green">115</FONT>         */<a name="line.115"></a>
<FONT color="green">116</FONT>        static int lastIndexOf(CharSequence cs, int searchChar, int start) {<a name="line.116"></a>
<FONT color="green">117</FONT>            if (cs instanceof String) {<a name="line.117"></a>
<FONT color="green">118</FONT>                return ((String) cs).lastIndexOf(searchChar, start);<a name="line.118"></a>
<FONT color="green">119</FONT>            } else {<a name="line.119"></a>
<FONT color="green">120</FONT>                int sz = cs.length();<a name="line.120"></a>
<FONT color="green">121</FONT>                if (start &lt; 0) {<a name="line.121"></a>
<FONT color="green">122</FONT>                    return -1;<a name="line.122"></a>
<FONT color="green">123</FONT>                }<a name="line.123"></a>
<FONT color="green">124</FONT>                if (start &gt;= sz) {<a name="line.124"></a>
<FONT color="green">125</FONT>                    start = sz - 1;<a name="line.125"></a>
<FONT color="green">126</FONT>                }<a name="line.126"></a>
<FONT color="green">127</FONT>                for (int i = start; i &gt;= 0; --i) {<a name="line.127"></a>
<FONT color="green">128</FONT>                    if (cs.charAt(i) == searchChar) {<a name="line.128"></a>
<FONT color="green">129</FONT>                        return i;<a name="line.129"></a>
<FONT color="green">130</FONT>                    }<a name="line.130"></a>
<FONT color="green">131</FONT>                }<a name="line.131"></a>
<FONT color="green">132</FONT>                return -1;<a name="line.132"></a>
<FONT color="green">133</FONT>            }<a name="line.133"></a>
<FONT color="green">134</FONT>        }<a name="line.134"></a>
<FONT color="green">135</FONT>    <a name="line.135"></a>
<FONT color="green">136</FONT>        /**<a name="line.136"></a>
<FONT color="green">137</FONT>         * Used by the lastIndexOf(CharSequence methods) as a green implementation of lastIndexOf<a name="line.137"></a>
<FONT color="green">138</FONT>         *<a name="line.138"></a>
<FONT color="green">139</FONT>         * @param cs the {@code CharSequence} to be processed<a name="line.139"></a>
<FONT color="green">140</FONT>         * @param searchChar the {@code CharSequence} to be searched for<a name="line.140"></a>
<FONT color="green">141</FONT>         * @param start the start index<a name="line.141"></a>
<FONT color="green">142</FONT>         * @return the index where the search sequence was found<a name="line.142"></a>
<FONT color="green">143</FONT>         */<a name="line.143"></a>
<FONT color="green">144</FONT>        static int lastIndexOf(CharSequence cs, CharSequence searchChar, int start) {<a name="line.144"></a>
<FONT color="green">145</FONT>            return cs.toString().lastIndexOf(searchChar.toString(), start);<a name="line.145"></a>
<FONT color="green">146</FONT>    //        if (cs instanceof String &amp;&amp; searchChar instanceof String) {<a name="line.146"></a>
<FONT color="green">147</FONT>    //            // TODO: Do we assume searchChar is usually relatively small;<a name="line.147"></a>
<FONT color="green">148</FONT>    //            //       If so then calling toString() on it is better than reverting to<a name="line.148"></a>
<FONT color="green">149</FONT>    //            //       the green implementation in the else block<a name="line.149"></a>
<FONT color="green">150</FONT>    //            return ((String) cs).lastIndexOf((String) searchChar, start);<a name="line.150"></a>
<FONT color="green">151</FONT>    //        } else {<a name="line.151"></a>
<FONT color="green">152</FONT>    //            // TODO: Implement rather than convert to String<a name="line.152"></a>
<FONT color="green">153</FONT>    //            return cs.toString().lastIndexOf(searchChar.toString(), start);<a name="line.153"></a>
<FONT color="green">154</FONT>    //        }<a name="line.154"></a>
<FONT color="green">155</FONT>        }<a name="line.155"></a>
<FONT color="green">156</FONT>    <a name="line.156"></a>
<FONT color="green">157</FONT>        /**<a name="line.157"></a>
<FONT color="green">158</FONT>         * Green implementation of toCharArray.<a name="line.158"></a>
<FONT color="green">159</FONT>         *<a name="line.159"></a>
<FONT color="green">160</FONT>         * @param cs the {@code CharSequence} to be processed<a name="line.160"></a>
<FONT color="green">161</FONT>         * @return the resulting char array<a name="line.161"></a>
<FONT color="green">162</FONT>         */<a name="line.162"></a>
<FONT color="green">163</FONT>        static char[] toCharArray(CharSequence cs) {<a name="line.163"></a>
<FONT color="green">164</FONT>            if (cs instanceof String) {<a name="line.164"></a>
<FONT color="green">165</FONT>                return ((String) cs).toCharArray();<a name="line.165"></a>
<FONT color="green">166</FONT>            } else {<a name="line.166"></a>
<FONT color="green">167</FONT>                int sz = cs.length();<a name="line.167"></a>
<FONT color="green">168</FONT>                char[] array = new char[cs.length()];<a name="line.168"></a>
<FONT color="green">169</FONT>                for (int i = 0; i &lt; sz; i++) {<a name="line.169"></a>
<FONT color="green">170</FONT>                    array[i] = cs.charAt(i);<a name="line.170"></a>
<FONT color="green">171</FONT>                }<a name="line.171"></a>
<FONT color="green">172</FONT>                return array;<a name="line.172"></a>
<FONT color="green">173</FONT>            }<a name="line.173"></a>
<FONT color="green">174</FONT>        }<a name="line.174"></a>
<FONT color="green">175</FONT>    <a name="line.175"></a>
<FONT color="green">176</FONT>        /**<a name="line.176"></a>
<FONT color="green">177</FONT>         * Green implementation of regionMatches.<a name="line.177"></a>
<FONT color="green">178</FONT>         *<a name="line.178"></a>
<FONT color="green">179</FONT>         * @param cs the {@code CharSequence} to be processed<a name="line.179"></a>
<FONT color="green">180</FONT>         * @param ignoreCase whether or not to be case insensitive<a name="line.180"></a>
<FONT color="green">181</FONT>         * @param thisStart the index to start on the {@code cs} CharSequence<a name="line.181"></a>
<FONT color="green">182</FONT>         * @param substring the {@code CharSequence} to be looked for<a name="line.182"></a>
<FONT color="green">183</FONT>         * @param start the index to start on the {@code substring} CharSequence<a name="line.183"></a>
<FONT color="green">184</FONT>         * @param length character length of the region<a name="line.184"></a>
<FONT color="green">185</FONT>         * @return whether the region matched<a name="line.185"></a>
<FONT color="green">186</FONT>         */<a name="line.186"></a>
<FONT color="green">187</FONT>        static boolean regionMatches(CharSequence cs, boolean ignoreCase, int thisStart,<a name="line.187"></a>
<FONT color="green">188</FONT>                CharSequence substring, int start, int length)    {<a name="line.188"></a>
<FONT color="green">189</FONT>            if (cs instanceof String &amp;&amp; substring instanceof String) {<a name="line.189"></a>
<FONT color="green">190</FONT>                return ((String) cs).regionMatches(ignoreCase, thisStart, (String) substring, start, length);<a name="line.190"></a>
<FONT color="green">191</FONT>            } else {<a name="line.191"></a>
<FONT color="green">192</FONT>                // TODO: Implement rather than convert to String<a name="line.192"></a>
<FONT color="green">193</FONT>                return cs.toString().regionMatches(ignoreCase, thisStart, substring.toString(), start, length);<a name="line.193"></a>
<FONT color="green">194</FONT>            }<a name="line.194"></a>
<FONT color="green">195</FONT>        }<a name="line.195"></a>
<FONT color="green">196</FONT>    <a name="line.196"></a>
<FONT color="green">197</FONT>    }<a name="line.197"></a>




























































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